import type { InjectionKey, UnwrapRef } from 'vue';
import {
  provide,
  inject,
  reactive,
  readonly as difineReadonly,
} from 'vue';

export interface CreateContextOptions {
  readonly?: boolean;
  createProvider?: boolean;
  native?: boolean; // 判断是否使用原生的provide/inject
}

type ShallowUnwrap<T> = {
  [P in keyof T]: UnwrapRef<T[P]>;
};

export function createContext<T>(
  context: any,
  key: InjectionKey<T> = Symbol(),
  options: CreateContextOptions = {},
) {
  const { readonly = true, createProvider = false, native = false } = options;
  const state = reactive(context);
  const provideData = readonly ? difineReadonly(state) : state;
  !createProvider && provide(key, native ? context : provideData);

  return {
    state
  };
}

export function useContext<T>(key: InjectionKey<T>, native?: boolean): T;

export function useContext<T>(
  key: InjectionKey<T> = Symbol(),
  defaultValue?: any,
): ShallowUnwrap<T> {
  return inject(key, defaultValue || {});
}
